Though the 60D results are useful in same-camera comparisons, you will find that results from this camera are not as sharp as results from the 1Ds III and other impressive Canon full frame cameras - even though identical test and processing settings (with a very low sharpness setting) were used. The T4i would deliver sharper results at the same processing settings (comparison), but the T4i has increased high ISO noise visibility as a result. There is a trade-off. The 60D results can also be given a higher sharpness setting. You are welcome to load 60D results into your favorite image processing application to see how increasing sharpness changes the results for the lens you are interested in.
Interesting spec: There are now 25,344 crops from 8,448 ISO 12233 test images available for review on the site.